/Engine/Plugins/FX/Niagara/Source/Niagara/Public/INiagaraMergeManager.h
struct FMergeEmitterResults
bool
bModifiedGraph
TArray<FText>
ErrorMessages
UNiagaraEmitter...
MergedInstance
UNiagaraMessage...
MergeNiagaraMessage
EMergeEmitterRe...
MergeResult